Patents by Inventor Johannes G. Robertus

Johannes G. Robertus has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Delegate unit for conference system
    Patent number: D349284
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: August 2, 1994
    Assignee: U.S. Philips Corporation
    Inventor: Johannes G. Robertus
  • Chairman unit for conference system
    Patent number: D349285
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: August 2, 1994
    Assignee: U.S. Philips Corporation
    Inventor: Johannes G. Robertus
  • Interpreter unit for conference system
    Patent number: D349286
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: August 2, 1994
    Assignee: U.S. Philips Corporation
    Inventor: Johannes G. Robertus